Can diet and exercise ease endometriosis pain? A trial finds a modest add-on effect
A 140-woman randomised trial found diet-and-exercise coaching, added to hormonal treatment, cut some pain scores more than usual care — but the differences were small and menstrual pain did not budge.
| Group | Value (%) |
|---|---|
| Diet + exercise coaching | 47 |
| Usual care | 27 |
Women with endometriosis are often told, vaguely, that diet and exercise might help their pain — usually without evidence attached. A randomised trial published in the European Journal of Obstetrics & Gynecology and Reproductive Biology on August 17, 2026 put that advice to a proper test, and the honest answer is: a little, for some kinds of pain, on top of standard treatment [s1].
Endometriosis affects roughly 10% of women and girls of reproductive age worldwide — about 190 million people — and there is no cure, so symptom control is the realistic goal [s2]. That is exactly where a low-risk add-on like diet and exercise, if it works, would be valuable.
What the trial did
Researchers ran an open-label, randomised, controlled trial (registered as NCT03994432) in 140 patients aged 18 to 45 who still had symptomatic endometriosis despite hormonal treatment [s1]. Women were assigned 1:1 to an intervention or a control group. The intervention group received structured coaching on a Mediterranean diet and aerobic exercise every four months, in addition to their hormonal therapy; the control group continued hormonal therapy and was monitored with no additional lifestyle advice [s1].
The primary outcome was the change in endometriosis-related pain, measured on an 11-point numerical rating scale, from baseline to 12 months, compared between the two groups [s1]. Because the trial was open-label — everyone knew which group they were in — it could not rule out a placebo-like effect from the attention and expectation that come with active coaching. That is a real limitation for a subjective outcome like pain.
What it found
The results were positive but modest, and selective. In the intention-to-treat analysis, the coaching group improved more than controls on two specific measures: non-menstrual pelvic pain fell by 1.60 points versus 0.74 (p = 0.03), and dyschezia — pain on defecation — fell by 0.86 points versus 0.04 (p = 0.02) [s1]. On an 11-point scale, those are small absolute differences between the groups, even where they reached statistical significance.
Just as telling is what did not change. The trial reported that depression scores and overall quality-of-life scores did not improve significantly, though the anxiety component did [s1]. And the improvements that did appear were in non-menstrual and bowel-related pain, not in the menstrual pain that many patients would rank first.
Where the intervention looked more convincing was in patients' own global sense of improvement. In the intention-to-treat analysis, 47% of the coaching group (95% CI, 35.9% to 58.7%) reported an overall improvement in their general health condition, against 27% of controls (95% CI, 18.1% to 38.5%; p = 0.01) [s1]. That is a wider gap than the individual pain scores suggest, and it is the kind of outcome — "do you feel better overall?" — that matters to patients, even as it is the most susceptible to the trial's open-label design.
How to read it
The authors' own framing is appropriately restrained: in endometriosis, lifestyle interventions "may complement hormonal treatment in improving symptom management and patients' well-being" [s1]. Complement, not replace. Nothing in this trial suggests diet and exercise can substitute for medical treatment, and everyone in it stayed on hormonal therapy throughout [s1].
The trial's strengths are that it was randomised, reasonably sized for this field, and measured pain with a standard scale over a full year [s1]. Its weaknesses are the open-label design, the modest size of the between-group differences, and the fact that the clearest benefit showed up in a global self-report rather than in the harder pain endpoints.
There is also a plausibility to the finding worth noting without overstating it. Endometriosis is an inflammatory condition, and both a Mediterranean-style diet and regular aerobic activity have general anti-inflammatory and mood benefits that could reasonably translate into modestly better symptom coping. But plausibility is not proof, and this trial cannot separate a genuine biological effect from the encouragement and structure of being coached every four months. Larger, longer and ideally blinded trials — hard to run for a lifestyle intervention — would be needed to settle that.
For a woman with endometriosis, the practical takeaway is measured. Adding a Mediterranean-style diet and regular aerobic exercise alongside existing treatment is low-risk and, in this trial, was associated with somewhat less non-menstrual and bowel pain and a better overall sense of health — but not with relief of period pain, and not as a stand-alone fix. That is a more useful, and more honest, message than the blanket advice it replaces.
Sources
- [s1] European Journal of Obstetrics & Gynecology and Reproductive Biology — https://doi.org/10.1016/j.ejogrb.2026.115381
- [s2] World Health Organization — https://www.who.int/news-room/fact-sheets/detail/endometriosis
Sources
- Diet and physical activity coaching for well-being and pain reduction in patients with symptomatic endometriosis: a randomized-controlled clinical trial — European Journal of Obstetrics & Gynecology and Reproductive Biology , August 17, 2026
- Endometriosis (fact sheet) — World Health Organization
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